# Sample Size Calculator App vs Equation Solver 4in1

The clearest difference is review sentiment: Sample Size Calculator App at 100% against Equation Solver 4in1's 28%. Sample Size Calculator App also leads on price ($0.99 vs $5.99) and iOS requirement (8.0 vs 12.0). Equation Solver 4in1's advantage is device support (4 vs 2). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Sample Size Calculator App costs $0.99 and Equation Solver 4in1 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sample Size Calculator App ships an update every 8 months, Equation Solver 4in1 every 7 months. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Sample Size Calculator App | Equation Solver 4in1 |
| --- | --- | --- |
| Price | **$0.99** | $5.99 |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/sample-size-calculator-app/id540050554/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 27.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 7 months** |
| Monetization | Paid | Paid |
| Size | 2 MB | 13 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [LHC Apps](https://appshunter.io/developer/540050557) | [Intemodino Group s.r.o.](https://appshunter.io/developer/557849644) |

## What reviewers say

### Sample Size Calculator App

[App page](https://appshunter.io/ios/app/sample-size-calculator-app/id540050554)

This app calculates sample sizes for statistical studies. It dynamically adjusts the sample size based on user inputs for margin of error, confidence level, population size, and proportion.

**Highlights:** Dynamic sample size calculation, Adjustable margin of error, Configurable confidence level, Population size input, Proportion input

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Equation Solver 4in1

[App page](https://appshunter.io/ios/app/equation-solver-4in1/id575826804)

This app helps you solve various types of equations, including linear, quadratic, cubic, and quartic. It provides step-by-step solutions for linear and quadratic equations and stores your calculation history.

**Highlights:** Linear equation solver, Quadratic equation solver, Cubic equation solver, Quartic equation solver, Step-by-step solutions, Equation history

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sample Size Calculator App free?

Sample Size Calculator App costs $0.99, with no in-app purchases.

### Is Equation Solver 4in1 free?

Equation Solver 4in1 costs $5.99, with no in-app purchases.

### Do Sample Size Calculator App or Equation Solver 4in1 have ads?

Neither Sample Size Calculator App nor Equation Solver 4in1 shows ads.

### Which is updated more often, Sample Size Calculator App or Equation Solver 4in1?

Sample Size Calculator App ships an update every 8 months, and Equation Solver 4in1 every 7 months. Most recently, Sample Size Calculator App was updated on September 23, 2026 and Equation Solver 4in1 on September 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*